Coach holds on for more money (5)
I believe the answer is:
bonus
'more money' is the definition.
'bonus' can be an answer for 'money' (I have seen 'extra money' mean 'bonus' so perhaps 'money' could also mean 'bonus'). I am not certain of the 'more' bit.
'coach holds on' is the wordplay.
'coach' becomes 'bus' (synonyms).
'holds' is an insertion indicator.
'bus' enclosing 'on' is 'BONUS'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for bonus that I've seen before include "Sum added to salary for good performance" , "Added extra" , "Additional award" , "Premium" , "bribe" .)